单项选择题
（）during the voyage any case or suspected case of plague，cholera，yellow fever，smallpox，typhus or relapsing fever?
A.Has there been
B.Have there been
C.Has there
D.Have there
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（）any sick person on board now apart from the above-mentioned cases?
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（）any person died on board during the voyage otherwise than as a result of accident?
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